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Samarium(III) oxide (Sm 2 O 3) is a chemical compound. Samarium oxide readily forms on the surface of samarium metal under humid conditions or temperatures in excess of 150°C in dry air. Similar to rust on metallic iron, this oxide layer spalls off the surface of the metal, exposing more metal to continue the reaction.
Samarium carbides are prepared by melting a graphite-metal mixture in an inert atmosphere. After the synthesis, they are unstable in air and are studied also under inert atmosphere. [13] Samarium monophosphide SmP is a semiconductor with the bandgap of 1.10 eV, the same as in silicon, and high electrical conductivity of n-type. It can be ...
GM-1 (Göring Mischung 1) was a system for injecting nitrous oxide into aircraft engines that was used by the Luftwaffe in World War II. This increased the amount of oxygen in the fuel mixture, and thereby improved high-altitude performance. GM-1 was used on several modifications of existing fighter designs to counter the increasing performance ...
[89] [90] [91] Samarium was thus the first chemical element to be named after a person. [84] [92] The word samaria is sometimes used to mean samarium(III) oxide, by analogy with yttria, zirconia, alumina, ceria, holmia, etc. The symbol Sm was suggested for samarium, but an alternative Sa was often used instead until the 1920s. [84] [93]
The Ramjet is a continuous-flow port-injection system. Unlike later fuel injection systems that used electronics, this one is based on purely mechanical principles. The two main sub-assemblies of the system are the air meter and the fuel meter. The air meter measures airflow into the engine and manages thermostatic warmup enrichment, fuel ...
Holley's product range has expanded to include the aforementioned fuel injection systems, performance fuel pumps, intake manifolds, superchargers, nitrous oxide injection, performance plumbing parts, exhaust systems, engine dress–up products, ignition products, data-logging and display products, handheld programmers, bellhousings, and ...
Pages in category "Samarium compounds" The following 8 pages are in this category, out of 8 total. This list may not reflect recent changes. P. Platinum–samarium; S.
The Ford EEC-III single-point fuel injection system, introduced in 1980, was another early digital fuel injection system. [ 56 ] [ 57 ] These and other electronic manifold injection systems (using either port injection or throttle-body injection ) became more widespread through the 1980s, and by the early 1990s they had replaced carburettors in ...